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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Longitude of Greenwich Observatory
From: Michael Dorl
Date: 2005 Dec 19, 07:02 -0600
From: Michael Dorl
Date: 2005 Dec 19, 07:02 -0600
> >Actually the Greenwich "discrepancy" was only 5.4 arc SECONDS of longitude. >But even that is unlikely and probably related to registering the imagery. I >would still like to know if that transit instrument at RGO is still the exact >zero of longitude. Has anyone on the list turned on a GPS receiver while >standing there? See http://www.iers.org/iers/earth/rotation/polmot/O-1.gif